I've kept an eye on the "battery health" meter on my Dashboard and on how long my battery lasts when I unplug the power cord. The health hovers at about 25% and battery life has been under an hour for the past week. It's in a sorry state right now. I want to run the recalibration process (and I might be able to give that a go this weekend) but I think I'm going to need a replacement battery. That will require either a cal to support or a trip to one of New York's Apple stores to speak to a Genius. I think I'll try the Genius route if I can get an appointment before I leave for the holidays. I don't like the idea of fighting the crowds in the store to get tech support at the height of the shopping season, but if I can get a new battery in the store, that would be worth the effort.
My calibrated HDTV still looks spectacular, so I think that effort a few weeks ago was time well spent. The incredible thing about owning a HDTV is that I am always impressed by the picture quality, even after 18 months. I will never get tired of watching sports and movies with a picture that amazing.